Getting TiVo 2 content would be a good feature and not impossibly difficult. However it will be slow (the network speed is very slow). TiVo 3 and any other protected content will be much harder to get since the manufacturers have worked very hard to protect it.

But let's be realistic here. While there might be a great chance of them including Galleon as it was built for linux during a Tivo sponsored competition, the Tivo Decoder is technically illegal because it breaks the DMCA.